The piece is riddled with errors and misrepresentations. Here’s a selection:

The “recent” paper on sea level rise de Lange and Leyland (dLL) reference in their first paragraph is from 2010! The latest Royal Society of NZ climate info was published last month, and is presumably what dLL meant to refer to.

The rise in sea level around NZ over the last 100 years is 17cm, not 14cm, according to the RSNZ (page 28 here).

dLL state that the current rate of sea level rise measured by satellite is 3.2 mm per year, with “indications of recent decline in the rate”. In fact it is 3.4mm per year, and shows no signs of any recent slowdown. If anything, there are hints of an acceleration in the underlying rate.

dLL claim that satellite measures are “about twice the tide gauge rate”. They’re not. They’re in good agreement. From Trends and acceleration in global and regional sea levels since 1807, Jevrejeva et al, Global and Planetary Change, 2013 (pdf)
There is an excellent agreement between the linear trends from GSL12 [latest tide gauge data] and satellite altimetry sea level since 1993, with rates of 3.1 ± 0.6 mm/yr and of 3.2 ± 0.4 mm/yr respectively.

The latest RSNZ projections are not “much more than anybody else” – they’re based on the IPCC’s AR5 and draw on the current literature. Larger projected future rises are widely used in planning overseas.

dLL state: “All the observational evidence indicates that the sea level is likely to rise 0.1 to 0.2 m by 2100.”This appears to be nothing more than wishful thinking. The current SLR rate gives 30cm plus by end of the century as a minimum.

There’s strong evidence of increased and increasing ice sheet mass loss in Greenland and Antarctica, which will add significantly to the amount of sea level rise by the end of the century. If we’re lucky, that might only be a metre. If we’re unlucky, it might be a great deal more.

If this were de Lange and Leyland’s only contribution to the debate on how communities should cope with sea level rise, it might be possible to shrug it off as a slapdash attempt at propaganda from a couple of people with a long history of climate denial. But de Lange is getting involved with the Christchurch community’s efforts to deal with this most challenging of issues.

Do Christchurch ratepayers really want to pay for advice from an “expert” who can’t get his facts right, and who is apparently happy to put his name to rubbish? The council should immediately ask for his withdrawal from the panel.

Future sea level rise is a certainty. Dealing with it is going to be challenging for any coastal community. We need a national framework that covers realistic assessments of local risk, and provides a process that allows communities to adapt as equitably as possible as their coastline changes. Trying to ignore or downplay the problem is only going to increase the costs faced by ratepayers and taxpayers in future years. If we allow the process to be contaminated by the input of propagandists we simply set ourselves up for greater losses.

Sciblogs editor Peter Griffin recently gave climate denial activists Bryan Leyland and Bob Carter a “right of reply” to my post pointing out the errors and inconsistencies in a Dominion Post op-ed penned by the pair. Griffin took this action because of vociferous complaints from Leyland, who took offence at my discussion of his expertise (non-existent) and history of campaigning against action on climate. The result is billed as a “rebuttal”, but it isn’t, as I shall demonstrate.

The Sciblogs “rebuttal” is a mishmash of a so-called “fully referenced” version (pdf) of the op-ed that Leyland says was supplied to the Dominion Post, but he and Carter also prepared a very long-winded “response” (pdf) to the debunking of their piece by David Wratt, Andy Reisinger and Jim Renwick in the DP. The latter is a real eye-opener…

Life is too short to do another point-by-point demolition1, so I’ll select a few key issues that demonstrate that although they claim to be discussing science in a scientific manner, what they are actually doing is having the equivalent of an argument in a pub — prepared to say anything if they think it will help them “win”.

Human influence on the climate system is clear and growing, and impacts are evident on all continents. If left unchecked, climate change will increase the likelihood of severe, pervasive and irreversible impacts for people and ecosystems.

We do have options to reduce risks by reducing greenhouse gas emissions and adapting to some climate change, but time is running short if we want to limit changes to manageable levels. Ignoring or misconstruing the overwhelming evidence is not a responsible risk management strategy.

It’s not clear whether the DomPost plans any further response to the rubbish they printed from Bryan Leyland and Bob Carter, but the editorial team at the newspaper would do well to reflect on the approach to the subject adopted by Guardian editor Alan Rusbridger, introducing an important new series of features in that paper:

For the purposes of our coming coverage, we will assume that the scientific consensus about man-made climate change and its likely effects is overwhelming. We will leave the skeptics and deniers to waste their time challenging the science. The mainstream argument has moved on to the politics and economics.

Precisely. Rusbridger — who is retiring after 20 years as editor — wants his newspaper to do justice…

…to this huge, overshadowing, overwhelming issue of how climate change will probably, within the lifetime of our children, cause untold havoc and stress to our species.
So, in the time left to me as editor, I thought I would try to harness the Guardian’s best resources to describe what is happening and what — if we do nothing — is almost certain to occur, a future that one distinguished scientist has termed as “incompatible with any reasonable characterisation of an organised, equitable and civilised global community”.

That’s what a real newspaper does: takes on the big issues. If the Dominion Post wants to be more than a Noddy book newspaper publishing rubbish from the intellectual heirs to Big Ears, it’s high time it took a sensible approach to the climate debate, and followed Rusbridger’s lead.

David Wratt is an Emeritus Climate Scientist at NIWA, an Adjunct Professor in the NZ Climate Change Research Institute at Victoria University, and a Vice Chair of Working Group 1 of the IPCC. Andy Reisinger is Deputy Director (International) of the New Zealand Agricultural Greenhouse Gas Research Centre and served as coordinating lead author in the most recent IPCC report. James Renwick is a Professor of Physical Geography at Victoria University of Wellington and served as a Lead Author on the last two IPCC Reports. [↩]

Carter with his Flat Earth society peersThe Dominion Post, the newspaper of record for New Zealand’s capital city, today gave great prominence to an opinion piece by high profile climate denialists Bob Carter and Bryan Leyland titled Hypothetical global warming: scepticism needed1. It’s a “Gish Gallop” of untruths, half-truths and misrepresentations — a piece so riddled with deliberate errors and gross misrepresentations that it beggars belief that any quality newspaper would give it space.

I will deal with the factual errors in a moment, but the DomPost‘s lack of editorial judgement extends well beyond any failure to fact check the article. Carter and Leyland’s expertise on the issue is misrepresented. The newspaper’s readers are not given a true picture of their “standing”. They are in fact paid/sponsored propagandists, way out on the crank fringes. Here’s how Carter is credited.

Professor Bob Carter is an honorary fellow of the Royal Society of NZ. His expertise is in geology and paleoclimatology — deducing past climates from geological records. He has written several books on climate change.

The IPA campaigns against climate action, and Carter recently starred in its Climate: Change the facts tour around Australia promoting a new propaganda pamphlet. As an adviser to the ICSC — a group attempting to promote climate denial around the world, he works to:

“…directly educate the public about what science, engineering and economics are really concluding about climate change and the downside of misguided plans (e.g., wind turbines, “carbon sequestration”, etc.) to “solve the crisis”. This includes newspaper articles, letters to the editor, radio and TV interviews, public presentations, regular postings on our, and others’, Web sites and use of all forms of popular social media.”

In other words, Carter and Leyland managed to con the DomPost into playing along with their propaganda campaign.

The DomPost credits Leyland thus:

Bryan Leyland is an engineer specialising in renewable energy. He is an accredited reviewer for the IPCC and has contributed several articles on renewable energy technologies to overseas publications.

In fact, Leyland has a long track record of activism against action to reduce carbon emissions. He was a founder member of the NZ Climate Science Coalition and a trustee of the NZ Climate Science Education Trust — formed to bring a court action against NIWA’s handling of the national temperature record. When the case was lost, the trust was folded so that Leyland and his fellow trustees could avoid paying $90,000 of court-ordered costs.

Leyland is notorious in NZ media circles for his attempts to push climate denial. It beggars belief that the DomPost did not know about his track record, and went ahead with publishing an article under his name without prominently noting his role as an activist.

As propagandists, the product that Leyland and Carter are pushing is doubt — a tactic first used by the tobacco industry, but since refined by fossil fuel interests keen to avoid emissions cuts. Leyland and Carter “win” every time a mainstream media outlet gives their views credence by giving them prominence. Newspapers do not regularly provide platforms for cranks, but that is exactly what Leyland and Carter are, as we shall see in a moment.

On page A7 – opposite the leader. Not currently available on the web, but a scan has been posted on Twitter — see this comment below. [↩]

Except perhaps for the professorship. Carter has no current academic affiliation that I know of, so I wonder why the DomPost is granting him that status? Surely he wouldn’t have misrepresented himself to the paper? [↩]

In an appalling lapse of editorial judgement, TVNZ has given notorious Climate “Science” Coalition propagandist Bryan Leylandfour minutes of airtime this morning [TVNZ page removed: but available here.] to rubbish the work of the IPCC. Yes, that’s right, the nation’s public broadcaster presented a man way out on the crank fringe who has made a late-life career out climate denial, against one of the largest scientific undertakings of all time — the IPCC’s Fifth Assessment Report. The IPCC, lest we forget, warned yesterday that world faces “severe, pervasive and irreversible” damage from climate change unless we cut emissions steeply.

Leyland was allowed to lie about about computer models and modellers, present a shonky graph, claim that increasing carbon dioxide in the atmosphere was a “huge benefit” to agriculture, and completely misrepresent the scientific consensus on the reality of warming. The presenter, Rawdon Christie, did try a little scripted pushback early in the piece, but was woefully underprepared to deal with a Leyland obviously gleeful at his opportunity to spout nonsense to the nation.

Here a list of Leyland’s lies, roughly transcribed from the video:

“Everything’s based on computer models – they’re programmed to show warming”

No they’re not. One of the oldest climate lies on the block, and Leyland uses it shamelessly. Worse, he’s allowed to get away with it by a woefully underprepared presenter.

Sea level rise has accelerated, and is expected to accelerate further as warming continues and ice sheets disintegrate.

Computer modellers are a small group — everyone else just goes along with them.

Absolute nonsense. This is a childish and overtly conspiracist misrepresentation of reality.

We’re entering a cooling period.

Another piece of wild nonsense from Leyland, betraying his parlous relationship with reality, and allowed to pass unchallenged by the presenter.

Increasing CO2 has been a huge benefit to plant growth — “not doing us any harm”

More completely made-up nonsense, allowed to pass unchallenged by Christie.

None of this is unexpected from Leyland. He has a long track record of persuading the more gullible NZ media to give him a platform to mislead, misrepresent and play fast and loose with the facts. TVNZ must have been aware of his notoriety, which makes their decision to present him on screen as “a renewable energy expert” grossly misleading and very likely a breach of broadcasting standards2.

But the biggest editorial lapse of all was the decision to put him on the show at all. Leyland is a lonely man out on the crank fringes of climate denial. To suggest that he has any sort of valid view on the reality of climate change — to set him up against the work of thousands of scientists around the world and the entire NZ scientific community — was outrageous. Climate change is far too serious an issue for the planet for a responsible broadcaster to play silly false balance games. They must broadcast an immediate correction and apology, and in future treat the issue with the seriousness it deserves.

[Update 5pm: It appears TVNZ have pulled the video of Leyland’s interview and the accompanying news story from their site in response to the many formal and informal complaints they have received. However the full interview can be seen (for the time being, at least) on Youtube. And the TVNZ News Facebook post about Leyland’s interview is still there.]